snap power monitoring modules - opto 22
TRANSCRIPT
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
PAGE 1
DATA SHEETForm 1453-180907
SNAP POWER-MONITORING MODULES
FeaturesConvenient pluggable wiring
Single-phase or three-phase power monitoring
Monitors AC RMS voltage and AC RMS current; calculates true power and volt-amps
10% over range
25,000 counts of resolution over input ranges
Out-of-range indication
Factory calibrated; no user adjustment necessary
DESCRIPTIONSNAP power-monitoring analog input modules provide an efficient
way to monitor AC voltage and current using a SNAP PAC
rack-mounted controller or SNAP PAC brain. These modules can be
used with both standard wired SNAP PAC brains and controllers and
Wired+Wireless™ models.
Three power-monitoring modules are available:
• The SNAP-AIPM monitors single-phase AC power.
• The SNAP-AIPM-3 monitors three-phase AC power using a
standard current transformer (CT).
• The SNAP-AIPM-3V monitors three-phase AC power using a
0.333 VAC current transformer (CT).
All modules mount on a SNAP PAC rack right alongside digital, analog,
and serial SNAP I/O™ modules.
SNAP power-monitoring modules help you measure and control
power usage, so you can reduce costs, maintain power quality, and
track energy use. If they are part of a SNAP PAC System running a PAC
Control™ strategy, strategy logic can automatically perform additional
calculations and respond to any problems the module reports.
SNAP racks have a retention rail locking system. Use two 4-40 by
½-inch standard machine screws to hold each module securely in
position on the SNAP rack.
SNAP-AIPM
The SNAP-AIPM individually and simultaneously measures
single-phase AC volts RMS and amps RMS and calculates true power
and volt-amps. Power factor can then be calculated from true power
and volt-amp values. Because true power is a signed value, either
leading or lagging power factor can be calculated.
The SNAP-AIPM module is designed for 85–250 volts and
0–10 amps, but it can also monitor AC line currents greater than 10
amps using a standard current transformer (CT) of suitable ratio. For
line voltage larger than 250 VAC, use a step-down potential
transformer. If hazardous voltage or current is to be monitored, an
interposing potential transformer and a CT must be used for safety.
>>>
>>>>
Wired
inputs:
- Volts
- Amps (or
volts from
0.333 VAC CT)
Data you get:
- Volts
- Amps
- Watts
- Volt Amps
And in SNAP-AIPM-3
and SNAP-AIPM-3V:
- True Power sum ABC
- True Power absolute
value sum
Power-monitoring modulesPart Numbers
Part Description
SNAP-AIPM Single-phase Power Monitoring Module, 85–250 V RMS and 0–10 A RMS Inputs
SNAP-AIPM-3 Three-phase Power Monitoring Module, 85–300 V RMS and 0–5 A RMS Inputs for Each Phase
SNAP-AIPM-3VThree-phase Power Monitoring Module, 85–300 V RMS and 0–0.333 VAC CT Inputs for Each Phase
SNAP-AIPM Module
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© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
DATA SHEETForm 1453-180907
The SNAP-AIPM module offers four channels (points) of data, two
from wired inputs and two calculated by the module:
To calculate power factor, simply use the data in points 2 and 3 in the
formula: Power Factor = (True Power Magnitude)/ (volt-amps).
SNAP-AIPM-3
The SNAP-AIPM-3 provides 14 channels of data, some from wired
inputs and some calculated by the module. For each of the three
phases, the module includes the same four channels as in the
SNAP-AIPM (see previous page); in addition, it includes two
summation values. Calculations occur within the module and are
available to the SNAP PAC brain or rack-mounted controller. All
channels are shown in the table below.
CTs must be used for current inputs. Potential transformers are
required for voltage inputs when voltage exceeds 300 VAC.
Required: Brain firmware 9.1b and PAC Project 9.1a or newer.
Data Channels for SNAP-AIPM-3
SNAP-AIPM-3V
The SNAP-AIPM-3V also provides 14 channels of data, some from
wired inputs and some calculated by the module. All channels are
shown in the table below.
The SNAP-AIPM-3V requires CTs with a 0.333 VAC secondary. These
CTs are safer and less expensive than the CTs used with the
SNAP-AIPM-3. See the Split-Core Current Transformers Data Sheet (form
1938) for suitable CTs available through Opto 22.
Required: Brain firmware 9.1b and PAC Project 9.1a or newer.
Data Channels for SNAP-AIPM-3V
Isolation
All SNAP analog input modules, including the SNAP-AIPM,
SNAP-AIPM-3, and SNAP-AIPM-3V, are transformer isolated as well as
optically isolated from all other modules and from the SNAP PAC brain
or rack-mounted controller.
Optical isolation provides 4,000 volts of transient (4,000 V for 1 ms)
protection for sensitive control electronics from industrial field signals.
Transformer isolation prevents ground loop currents from flowing
between field devices and causing noise that produces erroneous
readings. Ground loop currents are caused when two grounded field
devices share a connection, and the ground potential at each device
is different.
Pt Data Data Source
0 0–250 AC VRMS Measured from VRMS input
1 0–10 AC ARMS Measured from ARMS input
2 True Power Calculated from synchronous measurement of volts and amps
3 Volt-Amps Calculated (VRMS x ARMS)
Pt Data Data Source
0 0–300 AC VRMS Phase A: Measured from VRMS input
1 0–5 AC ARMS Phase A, from ARMS input
2 True Power Phase A: Calculated from synchronous mea-surement of volts and amps
3 Volt-Amps Phase A: Calculated (VRMS x ARMS)
4 0–300 AC VRMS Phase B: Measured from VRMS input
5 0–5 AC ARMS Phase B, from ARMS input
6 True Power Phase B: Calculated from synchronous mea-surement of volts and amps
7 Volt-Amps Phase B: Calculated (VRMS x ARMS)
8 0–300 AC VRMS Phase C: Measured from VRMS input
9 0–5 AC ARMS Phase C, from ARMS input
10 True Power Phase C: Calculated from synchronous mea-surement of volts and amps
11 Volt-Amps Phase C: Calculated (VRMS x ARMS)
12 1-second energy sum True Power sum ABC (signed)
13 1-second abs energy sum
True Power sum of absolute value of each A, B, and C (always positive)
Pt Data Data Source
0 0–300 AC VRMS Phase A: Measured from VRMS input
1 0–0.333 VAC Phase A, from ARMS input
2 True Power Phase A: Calculated from synchronous mea-surement of volts and amps
3 Volt-Amps Phase A: Calculated (VRMS x ARMS)
4 0–300 AC VRMS Phase B: Measured from VRMS input
5 0–0.333 VAC Phase B, from ARMS input
6 True Power Phase B: Calculated from synchronous mea-surement of volts and amps
7 Volt-Amps Phase B: Calculated (VRMS x ARMS)
8 0–300 AC VRMS Phase C: Measured from VRMS input
9 0–0.333 VAC Phase C, from ARMS input
10 True Power Phase C: Calculated from synchronous mea-surement of volts and amps
11 Volt-Amps Phase C: Calculated (VRMS x ARMS)
12 1-second energy sum True Power sum ABC (signed)
13 1-second abs energy sum
True Power sum of absolute value of each A, B, and C (always positive)
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
PAGE 3
DATA SHEETForm 1453-180907
However, note that the input points on the modules in this data sheet
are not isolated from each other. Because they share the same
reference terminal, polarity must be observed.
Note for legacy hardware: The SNAP-AIPM module can also be
used with SNAP Ultimate, SNAP Ethernet, and SNAP Simple brains and
on a SNAP M-series or B-series mounting rack.
The SNAP-AIPM-3 and SNAP-AIPM-3V cannot be used with legacy
hardware. They require a SNAP PAC brain or rack-mounted controller.
The SNAP-AIPM-3 and SNAP-AIPM-3V require brain firmware version
9.1b or newer and PAC Project version 9.1a or newer.
SPECIFICATIONS: SNAP-AIPM
SNAP-AIPM
Voltage Inputs (each voltage channel)
Recommended Input RangeScaled Input Range
85 to 250 VAC RMS0 to 250 VAC RMS
Input Over Range To 275 volts
Resolution 10 mV
Accuracy (47 to 63 Hz) (When used within recommended range) ± 0.2 V plus ± 0.2% reading (at full scale = ± 0.7 V or 0.28%)
RMS Integration Time/ Data Freshness 1000 ms (synchronous with current measurement)
Input Filtering Time constant = 70 μs (analog front end)(–0.2 dB at 660 Hz; –3 dB at 1.89 kHz) nominal
Input Resistance – Single Ended
1 Megohm NOTE: Because both channels share the same reference terminal, polarity must be observed when connecting the current channel.
Maximum Input 300 V non-operating
Current Inputs (each current channel)
Input Range 0 to 10 AC amps RMS
Input Over Range To 11 amps (Reading is not reliable over 11 A.)
Input Overload 15 A continuous, non-operating
Resolution 400 μA
Accuracy (47 to 63 Hz) ± 8 mA plus ± 0.2% reading (at full scale = ± 28 mA or 0.28%)
RMS Integration Time/ Data Freshness 1000 ms (synchronous with voltage measurement)
Input Filtering Time constant = 105 μs (analog front end)(–0.2 dB at 660 Hz; –3 dB at 1.89 kHz) nominal
Input Resistance – Single Ended
0.005 Ohm NOTE: Because both channels share the same reference terminal, polarity must be observed when connecting the voltage channel.
Maximum Input 15 A continuous, non-operating
Calculated Channels
True Power and Volt-Amps Range
True power: 2500.0 Watts. Volt-amps: 2500.0 volt-amps (= 25,000 counts)(inputs = 250 volts and 10 amps)
Over Range 2750 Watts true power or 2750 Volt-amps (= 27,500 counts)
Accuracy:
PAGE 4
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DATA SHEETForm 1453-180907
True Power Volt-Amps
± 0.6% reading (at full scale = ± 15 Watts)± 0.6% reading (at full scale = ± 15 VA)
Resolution 100 mW with default scaling
AC Common Mode Rejection > –120 dB at 60 Hz
Maximum Operating Common Mode Voltage 250 VAC
Calculated Outputs
True Power 0–2500 W (from synchronous measurement of volts and amps)
Volt Amps 0–2500 VA (VRMS x ARMS)
General Specifications
Power Requirements 5.0 VDC ± 0.15 VDC at 100 mA
Ambient Temperature: Operating Storage
-20 to 70 °C-40 to 85 °C
Humidity 5-95%, non-condensing
Wire size 22 to 14 AWG
Torque, hold-down screws 4 in-lb (0.45 N-m)
Torque, connector screws 5.26 in-lb (0.6 N-m)
Agency Approvals CE, RoHS, DFARS
Warranty Lifetime
SNAP-AIPM (Continued)
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© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
PAGE 5
DATA SHEETForm 1453-180907
SPECIFICATIONS: SNAP-AIPM-3 AND SNAP-AIPM-3V
SNAP-AIPM-3 SNAP-AIPM-3V
Voltage Inputs (each voltage channel)
Recommended Input RangeScaled Input Range 85 to 300 VAC RMS*
0 to 300 VAC RMS85 to 300 VAC RMS*0 to 300 VAC RMS
Input Over Range To 330 volts To 330 volts
Resolution 12 mV 12 mV
Accuracy (47 to 63 Hz)(When used within recommended range) ± 0.2 V plus ± 0.2% reading (at full scale = ± 0.7 V or 0.28%)
(When used within recommended range) ±0.2 V plus ±0.2% reading (at full scale = ±0.2 V + ±0.8 V = ±1.0 V)
RMS Integration Time/ Data Freshness
1000 ms (synchronous with current measure-ment) 1000 ms (synchronous with current measurement)
Input Filtering Time constant = 70 μs (analog front end)(–0.2 dB at 660 Hz; –3 dB at 1.89 kHz) nominal
Time constant = 70 μs (analog front end)(–0.2 dB at 660 Hz; –3 dB at 1.89 kHz) nominal
Input Resistance – Single Ended
1 Megohm NOTE: Because both channels share the same reference terminal, polarity must be observed when connecting the current channel.
1 Megohm NOTE: Because both channels share the same refer-ence terminal, polarity must be observed when connecting the current channel.
Maximum Input 330 V non-operating 330 V non-operating
Current Inputs (each current channel)
Input Range 0 to 5 AC amps RMS* 0 to 0.333 VAC current transformer input
Input Over Range To 5.5 amps (Reading is not reliable over 5.5 A) To 0.366 VAC
Input Overload 15 A continuous, non-operating 5 VAC continuous, non-operating
Resolution 200 μA 13.3 μV AC
Accuracy (47 to 63 Hz) ± 4 mA plus ± 0.2% reading (at full scale = ± 28 mA or 0.28%)
± 266 microvolts plus 0.2% of reading (at full scale = 266 μV + 667 μV = 933 μV = 0.28%)
RMS Integration Time/ Data Freshness
1000 ms (synchronous with voltage measure-ment) 1000 ms (synchronous with voltage measurement)
Input Filtering Time constant = 105 μs (analog front end)(–0.2 dB at 660 Hz; –3 dB at 1.89 kHz) nominal
Time constant = 105 μs (analog front end)(–0.2 dB at 660 Hz; –3 dB at 1.89 kHz) nominal
Input Resistance – Single Ended
0.005 Ohm NOTE: Because both channels share the same reference terminal, polarity must be observed when connecting the voltage channel.
500 K Ohms NOTE: Because both channels share the same refer-ence terminal, polarity must be observed when connecting the voltage channel.
Maximum Input 15 A continuous, non-operating 5 VAC continuous, non-operating
Calculated Channels
True Power and Volt–Amps Range
True power: 1500.0 Watts. Volt-amps: 1500.0 volt-amps(inputs = 300 volts and 5 amps)
True power and volt-amps are calculated from 300 volts and the full-scale current input of your 0.333 VAC output CT.
Over Range 1650 Watts true power or 16,500 counts volt-amps Depends on CT selection
Accuracy:
True Power Volt-Amps
± 0.6% reading (at full scale = ± 15 Watts)± 0.6% reading (at full scale = ± 15 VA)
± 0.6% reading ± 0.6% reading
Resolution 100 mW with default scaling Depends on CT selection
PAGE 6
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© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
DATA SHEETForm 1453-180907
IMPORTANT NOTES ON WIRINGWiring should be done by a licensed electrician. Be sure to use
appropriate CTs, and never mix CT types on the same device. The
wrong CT can cause severe damage to equipment.
For the SNAP-AIPM-3V module, suitable CTs with a 0.333 VAC
secondary are available from Opto 22. See form #1938, the Split-Core Current Transformers Data Sheet, for more information.
IMPORTANT—Voltage change: Older SNAP-AIPM-3 and
SNAP-AIPM-3V modules (manufactured before April 2011) were
designed with an input range of 0–250 volts (not 0–300 V) for points
0, 4, and 8. Older SNAP-AIPM-3 modules used 0–10 A (not 0–5).
Before wiring or scaling, check the printed information on the module
to make sure you are using the correct voltage and current. Older
modules can be exchanged for newer ones; contact Product Support
for information.
Wiring diagrams begin on page 11.
SCALINGIf you are using PAC Control, when you configure the points on SNAP
power monitoring modules, you must scale them to match the CT
you use. Scaling must be accurate for the resulting data to be
accurate. The examples starting on page 7 can help you determine
the correct values for your CT and module.
IMPORTANT: For all installations of 85 to 300 VAC (or 85–250 for the
SNAP-AIPM), both Actual and Scaled Volts (point 0 on all modules,
plus points 4 and 8 on the SNAP-AIPM-3 and SNAP-AIPM-3V) should
remain at the default: 0–250 VAC for the SNAP-AIPM and 0–300 VAC
for the SNAP-AIPM-3 and SNAP-AIPM-3V.
However, for installations over 300 VAC (250 for the SNAP-AIPM), you
will need to scale these points. For help, see “Scaling Example 2:
SNAP-AIPM with PT” on page 8, “Scaling Example 4: SNAP-AIPM-3
with PT” on page 9, or “Scaling Example 6: SNAP-AIPM-3V with PT” on
page 10. Note that these examples of higher line voltage require you
to use a step-down potential transformer.
AC Common Mode Rejection > –120 dB at 60 Hz > –120 dB at 60 Hz
Maximum Operating Common Mode Voltage 300 VAC 300 VAC
Calculated Outputs
True Power 0–1500 W (from synchronous measurement of volts and amps)
W (from synchronous measurement of volts and amps)**
Volt Amps 0–1500 VA (VRMS x ARMS) VA (VRMS x ARMS)**
1-second Energy Sum 0–4500 joules (true power sum ABC, signed) Joules (true power sum ABC, signed)**
1-second abs Energy Sum 0–4500 joules (true power sum of absolute value of each A, B, and C, always positive)
Joules (true power sum of absolute value of each A, B, and C, always positive)**
General Specifications
Power Requirements 5.0 VDC ± 0.15 VDC at 100 mA 5.0 VDC ± 0.15 VDC at 100 mA
Ambient Temperature: Operating Storage
-20 to 70 °C-40 to 85 °C
-20 to 70 °C-40 to 85 °C
Humidity 5-95%, non-condensing 5-95%, non-condensing
Agency Approvals CE, RoHS, DFARS CE, RoHS, DFARS
Warranty Lifetime Lifetime
*Inputs on older modules were 0–250 V and for SNAP-AIPM-3, 0–10 A. Before wiring or scaling, check printed information on the module to make sure you are using the correct voltage and current. Contact Opto 22 Product Support with any questions.**Values depend on CT selection.
SNAP-AIPM-3 (Continued) SNAP-AIPM-3V (Continued)
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PAGE 7
DATA SHEETForm 1453-180907
Steps for Scaling Modules in PAC Control
NOTE: SNAP-AIPM-3 and SNAP-AIPM-3V require brain firmware 9.1b or newer and PAC Control 9.1a or newer.
1. In PAC Control, open your strategy. In the Strategy Tree, right-click
the I/O unit containing the power monitoring module and
choose Configure from the popup menu.
2. Click the I/O points button. Double-click the module’s position
number on the rack. Click Analog Input and then choose the
module’s part number from the list. Click OK.
3. Click the plus sign next to the module to open its points.
For the SNAP-AIPM, you see four points. For the SNAP-AIPM-3
(shown above) or the SNAP-AIPM-3V, you see 14. You must con-
figure each point.
4. Double-click point 0, the voltage input, and give it a name. If
you’re not using a PT, leave the scaling as is. The following image
illustrates point 0 for Scaling Example 3 on page 8.
5. Click OK.
6. Continue to configure each point on the module, following the
calculations in the examples:
SNAP-AIPM—page 7
SNAP-AIPM-3—page 8
SNAP-AIPM-3V—page 9
7. Here is point 1 completed for Scaling Example 3:
Scaling Example 1: SNAP-AIPM without PT
Leave Actual values at their defaults for all points, and leave Lower
Scaled values at 0. Calculate Upper Scaled values for points as follows:
Point 0: Always 250 volts for line voltage between 85 and 250 VAC.
(For line voltage over 250 V, use Example 2.)
Point 1: 10* (CT primary / CT secondary)
Point 2: Upper Scaled for pt 0 (voltage)* Upper Scaled for pt 1
(current)
Point 3: Upper Scaled for voltage * Upper Scaled for current
Example
Voltage: 240 VAC (no potential transformer required)
Current: 180 amps (requires CT primary of 200).
CT has a secondary of 5 A; the module accommodates 10 A. So to
calculate point 1: 10 * (200/5) = 400
...points 2 and 3: 250 * 400 = 100,000
PAGE 8
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© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
DATA SHEETForm 1453-180907
Scaling Example 2: SNAP-AIPM with PT
For line voltage higher than 250 VAC, a step-down potential
transformer (PT) must be used.
Leave Actual values at their defaults for all points, and leave Lower
Scaled at 0. Calculate Upper Scaled values for points as follows:
Point 0: 250 * PT ratio
Point 1: 10* (CT primary / CT secondary)
Point 2: Upper Scaled for pt 0 (voltage)* Upper Scaled for pt 1
(current)
Point 3: Upper Scaled for voltage * Upper Scaled for current
Example
Voltage: 277 VAC (requires potential transformer). PT ratio is 2:1
Current: 350 amps (Requires CT primary of 400.) CT secondary is 5 A;
the module accommodates 10 A.
So to calculate point 0: 250 * 2 = 500
...point 1: 10 * (400/5) = 800
...points 2 and 3: 500 * 800 = 400,000
Scaling Example 3: SNAP-AIPM-3 without PT
Leave Actual values at their defaults for all points, and leave Lower
Scaled values at 0. Calculate Upper Scaled values for points as follows:
Points 0, 4, 8: Always 300 volts1 for line voltage between 85 and 300
VAC. (For line voltage over 300 V, use Example 2.)
Points 1, 5, 9: 5* (CT primary / CT secondary)
Points 2, 6, 10: Upper Scaled for voltage * Upper Scaled for current
(ex. Upper Scaled for pt 0 * Upper Scaled for pt 1)
Points 3, 7, 11: Upper Scaled for voltage * Upper Scaled for current
Points 12, 13: 3 * Upper Scaled for voltage * Upper Scaled for
current
Example
Voltage: 240 VAC (no potential transformer required)
Current: 180 amps (requires CT primary of 200). CT secondary is 5 A.
So to calculate points 1, 5, 9: 5 * (200/5) = 200
...points 2, 6, 10, 3, 7, 11: 300 * 200 = 60,000
...points 12, 13: 3 * 300 * 200 = 180,000
1 IMPORTANT—Voltage change: Older SNAP-AIPM-3 modules
used 0–250 volts and 0–10 amps. Before wiring or scaling, check the
printed information on the module to make sure you are using the
correct voltage and current. Contact Product Support to exchange
older modules.
Voltage CurrentPoint 0 Point 1
Actual Scaled Actual ScaledUnits VAC VAC A ALower 0 0 0 0Upper 250 250 10 400
Watts Volt AmpsPoint 2 Point 3
Actual Scaled Actual ScaledUnits W W VA VALower 0 0 0 0Upper 2500 100,000 2500 100,000
Voltage CurrentPoint 0 (4, 8) Point 1 (5, 9)
Actual Scaled Actual ScaledUnits VAC VAC A ALower 0 0 0 0Upper 250 500 10 800
Watts Volt AmpsPoint 2 (6, 10) Point 3 (7, 11)
Actual Scaled Actual ScaledUnits W W VA VALower 0 0 0 0Upper 2500 400,000 2500 400,000
Voltage CurrentPoints 0, 4, 8 Points 1, 5, 9
Actual Scaled Actual ScaledUnits VAC VAC A ALower 0 0 0 0Upper 300 300 5 200
Watts Volt AmpsPoints 2, 6, 10 Points 3, 7, 11
Actual Scaled Actual ScaledUnits W W VA VALower 0 0 0 0Upper 1500 60,000 1500 60,000
True Power & ABSPoints 12 & 13
Actual ScaledUnits J JLower 0 0Upper 4500 180,000
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PAGE 9
DATA SHEETForm 1453-180907
Scaling Example 4: SNAP-AIPM-3 with PT
For line voltage higher than 300 VAC1, a step-down potential
transformer (PT) must be used. Leave Actual values at their defaults
for all points, and leave Lower Scaled at 0. Calculate Upper Scaled
values for points as follows:
Points 0, 4, 8: 300 * PT ratio
Points 1, 5, 9: 5* (CT primary / CT secondary)
Points 2, 6, 10: Upper Scaled for voltage * Upper Scaled for current
(ex. Upper Scaled for pt 0 * Upper Scaled for pt 1)
Points 3, 7, 11: Upper Scaled for voltage * Upper Scaled for current
Points 12, 13: 3 * Upper Scaled for voltage * Upper Scaled for
current
Example
Voltage: 480 VAC (requires potential transformer). PT ratio is 2:1
Current: 350 amps (Requires CT primary of 400.) CT secondary is 5 A.
So to calculate points 0, 4, 8: 300 * 2 = 600
...points 1, 5, 9: 5 * (400/5) = 400
...points 2, 6, 10, 3, 7, 11: 600 * 400 = 240,000
...points 12, 13: 3 * 600 * 400 = 720,000
1 IMPORTANT—Voltage change: Older SNAP-AIPM-3 modules
used 0–250 volts and 0–10 amps. Before wiring or scaling, check the
printed information on the module to make sure you are using the
correct voltage and current. Contact Product Support to exchange
older modules.
Scaling Example 5: SNAP-AIPM-3V without PT
The SNAP-AIPM-3V requires CTs with a 0.333 VAC secondary. (For
suitable CTs, see Opto 22 form #1938, the Split-Core Current Transformers Data Sheet.)
Leave Actual values at their defaults for all points, and leave Lower
Scaled at 0. Calculate Upper Scaled as follows:
Points 0, 4, 8: Always 300 volts1 for line voltage between 85 and 300
VAC. (For line voltage over 250 V, use Example 4.)
Points 1, 5, 9: Primary of the CT
Points 2, 6, 10: Upper Scaled for voltage * Upper Scaled for current
(ex. Upper Scaled for pt 0 * Upper Scaled for pt 1)
Points 3, 7, 11: Upper Scaled for voltage * Upper Scaled for current
Points 12, 13: 3 * Upper Scaled for voltage * Upper Scaled for
current
Example
Voltage: 240 VAC (no potential transformer required)
Current: 100 amps (using a CT primary of 150)
So to calculate points 2, 6, 10, 3, 7, 11: 300 * 150 = 45,000
...points 12, 13: 3 * 300 * 150 = 135,000
1 IMPORTANT—Voltage change: Older SNAP-AIPM-3V modules
had an input range of 0–250 volts for points 0, 4, & 8. Before wiring or
scaling, check the printed information on the module to make sure
you are using the correct voltage. Contact Product Support to
exchange older modules.
Voltage CurrentPoints 0, 4, 8 Points 1, 5, 9
Actual Scaled Actual ScaledUnits VAC VAC A ALower 0 0 0 0Upper 300 600 5 400
Watts Volt AmpsPoints 2, 6, 10 Points 3, 7, 11
Actual Scaled Actual ScaledUnits W W VA VALower 0 0 0 0Upper 1500 240,000 1500 240,000
True Power & ABSPoints 12 & 13
Actual ScaledUnits J JLower 0 0Upper 4500 720,000
Voltage CurrentPoints 0, 4, 8 Points 1, 5, 9
Actual Scaled Actual ScaledUnit VAC VAC V ALower 0 0 0 0Upper 300 300 0.333 150
Watts Volt AmpsPoints 2, 6, 10 Points 3, 7, 11
Actual Scaled Actual ScaledUnit W VALower 0 0 0 0Upper 1 45,000 1 45,000
True Power & ABSPoints 12 & 13
Actual ScaledUnit JLower 0 0Upper 1 135,000
PAGE 10
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
DATA SHEETForm 1453-180907
Scaling Example 6: SNAP-AIPM-3V with PT
For line voltage higher than 300 VAC1, a step-down potential
transformer (PT) must be used. The SNAP-AIPM-3V requires CTs with a
0.333 VAC secondary. Leave Actual values at their defaults for all
points, and leave Lower Scaled at 0. Calculate Upper Scaled as follows:
Points 0, 4, 8: 300 * PT ratio
Points 1, 5, 9: Primary of the CT
Points 2, 6, 10: Upper Scaled for voltage * Upper Scaled for current
(ex. Upper Scaled for pt 0 * Upper Scaled for pt 1)
Points 3, 7, 11: Upper Scaled for voltage * Upper Scaled for current
Points 12, 13: 3 * Upper Scaled for voltage * Upper Scaled for
current
Example
Voltage: 480 VAC (requires potential transformer). PT ratio is 2:1
Current: 350 amps (requires CT primary of 400)
So to calculate points 0, 4, 8: 300 * 2 = 600
...points 2, 6, 10, 3, 7, 11: 600 * 400 = 240,000
...points 12, 13: 3 * 600 * 400 = 720,000
1 IMPORTANT—Voltage change: Older SNAP-AIPM-3V modules
had an input range of 0–250 volts for points 0, 4, & 8. Before wiring or
scaling, check the printed information on the module to make sure
you are using the correct voltage. Contact Product Support to
exchange older modules.
Voltage CurrentPoints 0, 4, 8 Points 1, 5, 9
Actual Scaled Actual ScaledUnit VAC VAC V ALower 0 0 0 0Upper 300 600 0.333 400
Watts Volt AmpsPoints 2, 6, 10 Points 3, 7, 11
Actual Scaled Actual ScaledUnit W VALower 0 0 0 0Upper 1 240,000 1 240,000
True Power & ABSPoints 12 & 13
Actual ScaledUnit JLower 0 0Upper 1 720,000
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
PAGE 11
DATA SHEETForm 1453-180907
WIRING DIAGRAMS—SNAP-AIPM
Single Phase Standard Wiring Diagram
Measuring AC Voltage with a Voltage Transformer and a Current Transformer
Measuring AC Line Current Greater Than 10 Amps with a Current Transformer
CAUTION: Be very careful when connecting input
channels. Do not connect line voltage to the current
input channel; such a connection will result in severe
damage to the module. This damage is not covered by
warranty.
CAUTION: Use caution when selecting wire gauges for
your application. Use conservative wire gauges with
proper voltage ratings.
CAUTION: Terminals 3, 4, 5, and 6 share a common
connection inside the module.
CAUTION: The SNAP-AIPM module does not contain a
fuse. Protect the system by adding a fuse. See below for a
suggested vendor.
Suggested vendors
Protection fuses: http://www.littelfuse.com
Voltage and current transformers:
http://www.crmagnetics.com
PAGE 12
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
DATA SHEETForm 1453-180907
WIRING DIAGRAMS—SNAP-AIPM (CONTINUED)
Three-Phase Wiring to Three SNAP-AIPM Modules
See cautions on page 11. If you have a SNAP-AIPM-3 module, see page 14. For a SNAP-AIPM-3V, see page 16.
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
PAGE 13
DATA SHEETForm 1453-180907
WIRING DIAGRAMS—SNAP-AIPM (CONTINUED)
Three-Phase Wiring to Two SNAP-AIPM Modules
See cautions on page 11. If you have a SNAP-AIPM-3 module, see page 15. For a SNAP-AIPM-3V, see page 16.
PAGE 14
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
DATA SHEETForm 1453-180907
WIRING DIAGRAMS—SNAP-AIPM-3
Three-Phase Wiring to SNAP-AIPM-3 Module
CAUTION: Be very careful when connecting input channels. Do not
connect line voltage to the current input channel; such a
connection will cause severe damage to the module. This damage
is not covered by warranty. Use a current transformer instead.
CAUTION: Use caution when selecting wire gauges for your
application. Use conservative wire gauges with proper voltage
ratings.
CAUTION: Terminals 2 and 3 share a common connection inside the
module. Make sure you observe polarity when connecting the
second channel. To avoid a potentially hazardous short circuit,
double-check wiring before turning on the current to be monitored.
CAUTION: The SNAP-AIPM-3 module
does not contain a fuse. Protect the
system by adding a fuse.
Suggested vendors
Protection fuses:
http://www.littelfuse.com
Voltage and current transformers:
http://www.crmagnetics.com
Using this wiring, after you scale the module, the following measurements are available.
All measurements are synchronously updated every second:
IMPORTANT—Voltage change: Older SNAP-AIPM-3 modules used 0–250 volts and 0–10 amps. Before wiring
or scaling, check the printed information on the module to make sure you are using the correct voltage and
current.
• Individual phase to neutral voltage• Individual phase and load current• Individual phase power• Individual phase volt-amps
• 3-phase sum of 1 sec.—signed energy (watt sec-onds)
• 3-phase sum of 1 sec.—unsigned energy (watt sec)
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
PAGE 15
DATA SHEETForm 1453-180907
WIRING DIAGRAMS—SNAP-AIPM-3
Three-Phase Wiring to SNAP-AIPM-3 Module
NOTE: This wiring method is less expensive than the one on page 14
but does not provide as much information.
CAUTION: Be very careful when connecting input channels. Do not
connect line voltage to the current input channel; such a
connection will result in severe damage to the module. This
damage is not covered by warranty. Use a current transformer
instead.
CAUTION: Use caution when selecting wire gauges for your
application. Use conservative wire gauges with proper voltage
ratings.
CAUTION: Terminals 2 and 3 share a common connection inside the
module. Make sure you observe polarity when connecting the
second channel. To avoid a potentially hazardous short circuit,
double-check wiring before turning on the current to be monitored.
Using this wiring, after you scale the module, the following measurements are available.
All measurements are synchronously updated every second:
IMPORTANT—Voltage change: Older SNAP-AIPM-3 modules used 0–250 volts and 0–10
amps. Before wiring or scaling, check the printed information on the module to make sure
you are using the correct voltage and current.
• Volts, phase A to phase C• Volts, phase B to phase C
• 3-phase sum of 1 sec.—signed energy (watt seconds)• 3-phase sum of 1 sec.—unsigned energy (watt secs)
CAUTION: The SNAP-AIPM-3 module
does not contain a fuse. Protect the
system by adding a fuse.
Suggested vendors
Protection fuses:
http://www.littelfuse.com
Voltage and current transformers:
http://www.crmagnetics.com
PAGE 16
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
DATA SHEETForm 1453-180907
WIRING DIAGRAMS—SNAP-AIPM-3V
Three-Phase Wiring to SNAP-AIPM-3V Module
CAUTION: Be very careful when connecting input channels. Do not
connect line voltage to the current input channel; such a
connection will cause severe damage to the module. This damage
is not covered by warranty. Use a current transformer instead. Use
identical CTs on all phases.
CAUTION: Use caution when selecting wire gauges for your
application. Use conservative wire gauges with proper voltage
ratings.
CAUTION: Terminals 2 and 3 share a common connection inside the
module. Make sure you observe polarity when connecting the
second channel. To avoid a potentially hazardous short circuit,
double-check wiring before turning on the current to be monitored.
CAUTION: The SNAP-AIPM-3V module
does not contain a fuse. Protect the
system by adding a fuse.
Suggested vendors
Protection fuses:
http://www.littelfuse.com
Voltage and current transformers:
http://www.crmagnetics.com
Using this wiring, after you scale the module, the following measurements are available.
All measurements are synchronously updated every second:
Suitable current transformers (CTs) for use with the SNAP-AIPM-3V are available from Opto 22.
See form #1938, the Split-Core Current Transformers Data Sheet.
• Individual phase to neutral voltage• Individual phase and load current• Individual phase power• Individual phase volt-amps
• 3-phase sum of 1 sec.—signed energy (watt sec-onds)
• 3-phase sum of 1 sec.—unsigned energy (watt sec)
NOTE Voltage change: Older
SNAP-AIPM-3V modules had an input
range of 0–250 volts. Before wiring,
check printed specs on the module.
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
PAGE 17
DATA SHEETForm 1453-180907
WIRING DIAGRAMS—SNAP-AIPM-3V
Three-Phase Wiring to SNAP-AIPM-3V Module
NOTE: This wiring method is less expensive than the one on page 14
but does not provide as much information.
CAUTION: Be very careful when connecting input channels. Do not
connect line voltage to the current input channel; such a
connection will result in severe damage to the module. This
damage is not covered by warranty. Use a current transformer
instead. Identical CTs must be used on all phases.
CAUTION: Use caution when selecting wire gauges for your
application. Use conservative wire gauges with proper voltage
ratings.
CAUTION: Terminals 2 and 3 share a common connection inside the
module. Make sure you observe polarity when connecting the
second channel. To avoid a potentially hazardous short circuit,
double-check wiring before turning on the current to be monitored.
Using this wiring, after you scale the module, the following measurements are available.
All measurements are synchronously updated every second:
Suitable current transformers (CTs) for use with the SNAP-AIPM-3V are available from Opto 22.
See form #1938, the Split-Core Current Transformers Data Sheet, for more information.
• Volts, phase A to phase C• Volts, phase B to phase C
• 3-phase sum of 1 sec.—signed energy (watt seconds)• 3-phase sum of 1 sec.—unsigned energy (watt secs)
CAUTION: The SNAP-AIPM-3V
module does not contain a fuse.
Protect the system by adding a fuse.
Suggested vendors
Protection fuses:
http://www.littelfuse.com
Voltage and current transformers:
http://www.crmagnetics.com
NOTE Voltage change: Older SNAP-AIPM-3 modules had an input range
of 0–250 volts. Before wiring, check printed specs on the module.
PAGE 18
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
DATA SHEETForm 1453-180907
DIMENSIONAL DRAWING—SNAP-AIPM
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
PAGE 19
DATA SHEETForm 1453-180907
DIMENSIONAL DRAWING—SNAP-AIPM-3 AND SNAP-AIPM-3V
PAGE 20
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
DATA SHEETForm 1453-180907
DIMENSIONAL DRAWING—ALL AIPM MODULES
IMPORTANT: The mounting rack connector has 24 pins; the
module connector has 20 pins. The extra pins on the
mounting rack connector prevent misalignment of the
module during installation.
OPTO 22 • 800-321-6786 • 1-951-695-3000 • www.opto22.com • [email protected]
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
PAGE 21
DATA SHEETForm 1453-180907
DIMENSIONAL DRAWING—ALL AIPM MODULES
NOTE: The SNAP-AIPM-3 and SNAP-AIPM-3V have three connectors
on the top of the case, at the same height as shown below.
OPTO 22 • www.opto22.com SALES • [email protected] SUPPORT • [email protected] Business Park Dr. Temecula, CA 92590-3614 800-321-6786 • 1-951-695-3000 800-835-6786 • 1-951-695-3080
© 2006–2018 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
More about Opto 22
Form 1335-180323
PRODUCTSOpto 22 develops and manufactures reliable, easy-to-use, open standards-based hardware and software products.
Industrial automation, process control, building automation, industrial refrigeration, remote monitoring, data acquisition, and industrial internet of things (IIoT) applications worldwide all rely on Opto 22.
groov EPIC® System
Opto 22’s groov Edge Programmable Industrial Controller (EPIC) system is the culmination of over 40 years of experience in designing products for the automation industry.
groov EPIC gives you an industrially hardened system with guaranteed-for-life I/O, a flexible Linux®-based controller with gateway functions, and software for your IIoT application or any application.
groov EPIC I/O
I/O provides the local connection to sensors and equipment. groov I/O offers up to 24 channels on each I/O module, with a spring-clamp terminal strip, integrated wireway, and swing-away cover.
Opto 22 I/O is so reliable, we can afford to guarantee it for life. groov I/O is hot swappable, UL Hazardous Locations approved, and ATEX compliant.
groov EPIC Controller
The heart of the system is the groov EPIC controller. It handles a wide range of digital, analog, and serial functions for data collection, remote monitoring, process control, and discrete and hybrid manufacturing.
In addition, the EPIC provides secure data communications among physical assets, control systems, software applications, online services, and more, both on premises and in the cloud.
Configuring and troubleshooting I/O and networking is easier with the EPIC’s integrated high-resolution touchscreen. Authorized users can see your groov View HMI locally on the touchscreen or on a monitor connected via the HDMI or USB ports.
groov EPIC Software
Software includes:• Flowchart-based PAC Control for control programming, or build
your own custom application with optional secure shell access• groov View for building and viewing your own device-
independent HMI• Node-RED for creating simple logic flows from pre-built nodes
• Ignition Edge® from Inductive Automation®, with OPC-UA drivers to Allen-Bradley®, Siemens®, and other control systems, and MQTT/Sparkplug communications for efficient IIoT data transfer
groov Edge Appliance
Visualization, data handling, and connectivity in a compact, industrial box: that’s the groov Edge Appliance. Included are: • groov View for building and viewing operator
interfaces on PCs and mobile• Node-RED for building simple logic flows• Ignition Edge® from Inductive Automation®,
for OPC-UA drivers and MQTT/Sparkplug IIoT communications
Older products
From solid state relays (our first products) to world-famous G4 and SNAP I/O, to SNAP PAC controllers, Opto 22 products last a long time. You can count on us to give you the reliability and service you expect.
QUALITYFounded in 1974, Opto 22 has established a worldwide reputation for high-quality products. All are made in the U.S.A. at our manufacturing facility in Temecula, California.
Because we test each product twice before it leaves our factory rather than testing a sample of each batch, we can guarantee most solid-state relays and optically isolated I/O modules for life.
FREE PRODUCT SUPPORTOpto 22’s California-based Product Support Group offers free, comprehensive technical support for Opto 22 products from engineers with decades of training and experience. Support is available in English and Spanish by phone or email, Monday–Friday, 7 a.m. to 5 p.m. PST.
Support is always available on our website, including how-to videos, user’s guides, the Opto 22 KnowledgeBase, troubleshooting tips, and OptoForums. In addition, free hands-on training is available at our Temecula, California headquarters, and you can register online.
PURCHASING OPTO 22 PRODUCTSOpto 22 products are sold directly and through a worldwide network of distributors, partners, and system integrators. For more information, contact Opto 22 headquarters at 800-321-6786 (toll-free in the U.S. and Canada) or +1-951-695-3000, or visit our website at www.opto22.com.